Thick-tailed three-toed gerbil
| Thick-tailed three-toed gerbil | ||||||||||||
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| Salpingotus crassicauda | ||||||||||||
| Vinogradov , 1924 |
The thick-tailed three-toed jump mouse ( Salpingotus crassicauda ) is a species of rodent from the genus of the three-toed jump mouse ( Salpingotus ). It occurs in arid regions in Kazakhstan , Mongolia and northern China .
features
The thick-tailed three-toed gerbil reaches a head-torso length of 4.1 to 5.4 centimeters and has a tail of 9.3 to 10.5 centimeters in length . The animals weigh 10 to 14 grams. The rear foot length is 20 to 23 millimeters, the ear length 6 to 10 millimeters. The back fur is light sand yellow in color, the belly side is white. The tail is noticeably thickened in the front quarter. It is covered with woolly short hair, towards the end of the tail it has longer hair, which, however, does not form a tassel. The feet are small and have a brush-like pad near the toes.
| 1 | · | 0 | · | 1 | · | 3 | = 18 |
| 1 | · | 0 | · | 0 | · | 3 |
The skull has a total length of 23 to 24 millimeters and a width in the area of the cheekbones of 11.6 millimeters. It is short and gracefully built. The zygomatic arch is fully developed, it is small and narrow and curved in the front area and noticeably wide in the rear area. The tympanic membranes are greatly enlarged. Like all jerboas owned pets in the maxilla per half an an incisor tooth trained incisors (incisive) to which a tooth gap ( diastema follows). This is followed by a premolar and three molars . In contrast, the animals do not have a premolar in the lower jaw. In total, the animals have a set of 18 teeth.
distribution
The thick-tailed three-toed gerbil is found in arid regions in Kazakhstan , Mongolia and northern China . In the People's Republic of China, it is found in the north of Xinjiang , the west of Inner Mongolia and the north of Gansu .
Way of life
There is only limited data available on the lifestyle and ecology of the thick-tailed three-toed gerbil. It lives in dry and sandy regions with stable vegetation. The species feeds primarily on insects without hard chitin cuticles as well as on seeds and green parts of plants. The animals live in temporary and permanent structures that differ in structure. While the temporary structures are only simple, the more complex regular structures can reach corridor lengths of three meters and their entrances are locked. The breeding season is in the spring, the females probably only get one litter with two to three young animals.
Systematics
The thick-tailed three-toed jump mouse is classified as an independent species within the genus of the three-toed jump mouse ( Salpingotus ), which consists of six species. The first scientific description comes from Boris Winogradow from 1924, who described the species on the basis of individuals from northern Xinjiang in the Altai - Gobi area . The population south of Lake Balkhash and north of the Aral Sea in Kazakhstan, originally considered a subspecies, is now considered a separate species, Salpingotus pallidus .
Status, threat and protection
The International Union for Conservation of Nature and Natural Resources (IUCN) does not classify the thick-tailed three-toed gerbil in a hazard category (data deficient) due to insufficient data on distribution and populations. No data is available on the actual size of the population.
supporting documents
- ↑ a b c d e f g h i j Andrew T. Smith: Thick-Tailed Pygmy Jerboa. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, Princeton NJ 2008, ISBN 978-0-691-09984-2 , p. 203.
- ↑ Andrew T. Smith: Mongolian Five-Toad Jerboa. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, Princeton NJ 2008, ISBN 978-0-691-09984-2 , pp. 201-202.
- ↑ a b c Salpingotus crassicauda in the IUCN Red List of Threatened Species 2014.3. Posted by: N. Batsaikhan, K. Tsytsulina, 2008. Retrieved August 13, 2015.
- ↑ a b Salpingotus (Anguistodontus) crassicauda ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. . In: Don E. Wilson , DeeAnn M. Reeder (Eds.): Mammal Species of the World. A taxonomic and geographic Reference. 2 volumes. 3. Edition. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 .
literature
- Andrew T. Smith: Thick-Tailed Pygmy Jerboa. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, Princeton NJ 2008, ISBN 978-0-691-09984-2 , p. 203.
Web links
- Salpingotus crassicauda inthe IUCN Red List of Threatened Species 2014.3. Posted by: N. Batsaikhan, K. Tsytsulina, 2008. Retrieved August 13, 2015.